In Remnants of Skystone, players can choose to play as one of three distinct classes — the jetpack-wearing Aeronauts, the agile Ferrics, or the rope-swinging Crags — and will explore areas on the Ground with 2D, side-scrolling, platforming gameplay. Main missions and quests are undertaken in single-player gameplay, and players can team up with others in Co-op Trailblazing missions that change weekly. Spoils from missions can be used to decorate the players' personal housing called Floats, where other players can also visit to socialize. Players can also visit the central floating city of Nidaria to meet up with other players, take on missions and quests, and shop for new clothing, furniture, or restoratives.